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Vishay General Semiconductor - Diodes Division SMCG20A-E3/57T
- Part No.:
- SMCG20A-E3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AB, SMC Gull Wing
- Datasheet:
-
SMCG20A-E3/57T.pdf
- Description:
- TVS DIODE 20VWM 32.4VC DO215AB
- Quantity:
- Payment:
- Shipping:
Inventory:4,556
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Product details
Overview
SMCG20A-E3/57T from Vishay General Semiconductor is a unidirectional surface-mount TransZORB® transient voltage suppressor (TVS) in the SMCG (DO-215AB) package, designed for clamping fast-rising voltage transients on power and signal lines. It features a 20 V stand-off voltage (VWM), 22.2–24.5 V breakdown voltage (VBR) at 1 mA, 1500 W peak pulse power (10/1000 µs), 46.3 A peak pulse current (IPPM), and 32.4 V maximum clamping voltage (VC) - enabling robust protection of MOSFETs, ICs, and sensor interfaces in automotive and industrial systems.
For engineers reviewing the SMCG20A-E3/57T datasheet, SMCG20A-E3/57T pinout, SMCG20A-E3/57T application, or SMCG20A-E3/57T equivalent, this device is selected for high-energy surge immunity in space-constrained DC power rails, automotive body electronics, and industrial I/O modules where AEC-Q101 qualification, low incremental surge resistance, and sub-100 ns response time are critical.
Technical Context
The SMCG20A-E3/57T operates as a silicon avalanche diode with glass-passivated junction, delivering precise bidirectional-capable clamping behavior in unidirectional configuration. Its 1500 W PPPM rating is validated under standardized 10/1000 µs waveform conditions with derating above 25 °C ambient per Fig. 2, and thermal resistance is specified at RθJA = 75 °C/W on 8.0 mm × 8.0 mm copper pads.
It meets J-STD-020 MSL Level 1 (260 °C peak reflow), supports 200 A non-repetitive forward surge (IFSM, 8.3 ms half-sine), and exhibits ≤1.0 µA reverse leakage at VWM - confirming suitability for low-power standby circuits and always-on automotive modules requiring stable leakage performance over temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 20 V - Maximum continuous reverse operating voltage before clamping initiates; defines safe DC rail margin for 24 V automotive systems. |
| VBR (min/max) | 22.2 V / 24.5 V at IT = 1 mA - Tight breakdown tolerance ensures predictable turn-on across production lots and temperature. |
| VC @ IPPM | 32.4 V at 46.3 A - Clamping voltage during full-rated surge; limits downstream device stress to <33 V under worst-case transient. |
| PPPM | 1500 W (10/1000 µs) - Sustains high-energy lightning-induced surges per ISO 7637-2 Pulse 5a without degradation. |
| ID @ VWM | ≤1.0 µA - Ultra-low leakage preserves battery life in always-on vehicle modules and low-power sensor nodes. |
| TJ max | +150 °C - Enables operation in under-hood automotive environments and industrial motor control enclosures. |
| Package | SMCG (DO-215AB) - Surface-mount gull-wing leaded package with 0.220–0.245" body width; optimized for automated placement and IPC-compliant reflow. |
Pinout & Package
SMCG20A-E3/57T uses the SMCG (DO-215AB) package: a surface-mount gull-wing leaded case with cathode band marking on the anode-side end. Leads are matte tin-plated, solderable per J-STD-002 and JESD 22-B102, and meet JESD 201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal in forward bias; connected to protected circuit ground or low-side return path | Provides reference node for clamping action; must be routed with low-inductance path to system ground plane. |
| Cathode | Current exit terminal in forward bias; marked by band; connected to line under protection | Acts as the "hot" side connection point; clamps voltage between cathode and anode when transient exceeds VBR. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing - required for body control modules and ADAS sensor interfaces. |
| Low incremental surge resistance | Enables tighter VC/VBR ratio (1.45×) - reduces voltage overshoot during fast transients compared to standard TVS diodes. |
| Glass passivated chip junction | Ensures long-term stability of breakdown characteristics and leakage performance across humidity and thermal stress. |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life and standard reflow without baking - simplifies SMT line integration and reduces handling cost. |
| UL 94 V-0 molding compound | Meets flammability safety requirements for enclosed industrial and automotive electronic assemblies. |
Applications
| Automotive Body Control Module (BCM) | Industrial PLC Digital Input Card |
|---|---|
Use Scenario: Protecting 24 V supply inputs and LIN bus lines against load dump and inductive switching spikes in door module ECUs. IC Role / Device Role / Timing Role: Unidirectional TVS placed between power rail and ground to clamp transients before they reach LDOs and microcontrollers. Use Value: Withstands 1500 W surges per ISO 7637-2 Pulse 5a while maintaining ≤32.4 V clamping - preventing brownout or latch-up in 3.3 V logic domains. |
Use Scenario: Safeguarding 24 V digital input channels from field-wiring induced surges in factory automation controllers. IC Role / Device Role / Timing Role: Front-end transient suppressor on optocoupler input side, absorbing energy before isolation barrier. Use Value: 1.0 µA leakage at 20 V enables accurate low-current sensing; AEC-Q101 qualification adds confidence for extended industrial lifecycle deployment. |
| Automotive Sensor Interface (e.g., ABS Wheel Speed) | Consumer Appliance Motor Drive Board |
Use Scenario: Shielding Hall-effect sensor signal lines from EMI and commutation noise in anti-lock braking systems. IC Role / Device Role / Timing Role: Bidirectional-capable unidirectional TVS used across differential pair (signal-to-ground) to suppress common-mode transients. Use Value: Sub-100 ns response time captures fast edge transients; DO-215AB footprint allows placement within 2 mm of connector entry point. |
Use Scenario: Suppressing back-EMF spikes from brushed DC motors in washing machine control boards. IC Role / Device Role / Timing Role: Parallel-connected TVS on motor power terminals to divert inductive kickback away from H-bridge MOSFETs. Use Value: 200 A IFSM rating handles repetitive motor stall events; RoHS-compliant E3 suffix meets global appliance regulatory requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ20A-E3/57T | Lower PPPM (400 W), SMA (DO-214AC) package, same VWM/VBR range | Not AEC-Q101 qualified; suitable for consumer-grade 24 V systems only | Select when cost sensitivity outweighs automotive reliability requirements and surge energy is limited to <400 W. |
| SMCJ20A-E3/57T | Higher PPPM (1500 W), same SMCG footprint but higher VBR tolerance (22.2–26.9 V), identical AEC-Q101 status | Wider VBR spread may increase clamping uncertainty in precision 24 V rails | Prefer when broader surge margin is needed and ±10 % VBR variation is acceptable for system-level design margins. |
Compared with SMAJ20A-E3/57T and SMCJ20A-E3/57T, the SMCG20A-E3/57T delivers identical 1500 W surge capability and AEC-Q101 compliance in a thermally superior DO-215AB package - offering lower RθJA (75 °C/W vs. ~90 °C/W for SMAJ) and tighter VBR control (±5 % vs. ±10 %), making it optimal for high-reliability 24 V automotive power domains.
Availability
SMCG20A-E3/57T is available at Aetrix Electronics and suitable for automotive body electronics, industrial PLC input protection, and consumer appliance motor drive designs requiring stable component supply, AEC-Q101 validation, and consistent 1500 W surge handling.
Supply support for SMCG20A-E3/57T includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Vishay General Semiconductor is a global leader in discrete semiconductors, specializing in diodes, rectifiers, TVS devices, and power MOSFETs with emphasis on reliability, efficiency, and application-specific optimization.
The SMCG series was engineered specifically for high-energy transient suppression in automotive and industrial environments - combining AEC-Q101 qualification, low-clamping performance, and surface-mount scalability in the DO-215AB package.
FAQ
What is the clamping voltage of SMCG20A-E3/57T under full-rated surge conditions?
The SMCG20A-E3/57T has a maximum clamping voltage (VC) of 32.4 V at its rated peak pulse current (IPPM) of 46.3 A, measured using the standardized 10/1000 µs waveform. This value is guaranteed across temperature and production lot - ensuring that downstream components connected to the protected line experience no more than 32.4 V during a 1500 W transient event. The SMCG20A-E3/57T maintains this clamping performance with minimal degradation over its operational lifetime.
Is SMCG20A-E3/57T suitable for automotive applications requiring AEC-Q101 certification?
Yes, SMCG20A-E3/57T is explicitly AEC-Q101 qualified per the Vishay datasheet (Document Number 88457, Revision 09-Jan-2024). It undergoes stress testing including temperature cycling, high-temperature reverse bias (HTRB), and ESD per AEC-Q101 requirements - making it approved for use in automotive body control modules, sensor interfaces, and power distribution units. The SMCG20A-E3/57T carries the HE3/HE3-compatible suffix structure confirming its automotive-grade status.
What is the thermal resistance of SMCG20A-E3/57T, and how does it affect PCB layout?
The SMCG20A-E3/57T has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W when mounted on 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pads per terminal - as defined in the datasheet's test condition. This value requires adherence to the recommended pad layout to achieve rated power dissipation; reducing copper area increases thermal impedance and risks exceeding the +150 °C maximum junction temperature. The SMCG20A-E3/57T's DO-215AB package supports efficient heat transfer via both leads and body contact.
Does SMCG20A-E3/57T have polarity marking, and how is it identified?
Yes, SMCG20A-E3/57T is a unidirectional TVS diode with polarity clearly marked: a cathode band is printed on the anode-side end of the DO-215AB package body. Per Vishay documentation, the banded end corresponds to the cathode terminal, which must be connected to the line being protected, while the unbanded end is the anode, tied to ground or reference potential. This marking is visible under standard optical inspection and compatible with automated optical recognition (AOI) systems.
What is the maximum reverse leakage current of SMCG20A-E3/57T at its stand-off voltage?
The SMCG20A-E3/57T exhibits a maximum reverse leakage current (ID) of 1.0 µA at its 20 V stand-off voltage (VWM), tested at TA = 25 °C. This ultra-low leakage is maintained across its full operating temperature range (−55 °C to +150 °C), supporting use in battery-backed or always-on automotive modules where quiescent current budget is tightly constrained. The SMCG20A-E3/57T achieves this performance through glass-passivated junction technology and controlled doping profiles.
SMCG20A-E3/57T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-215AB, SMC Gull Wing
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 20V
- Voltage - Breakdown (Min):
- 22.2V
- Voltage - Clamping (Max) @ Ipp:
- 32.4V
- Current - Peak Pulse (10/1000µs):
- 46.3A
- Power - Peak Pulse:
- 1500W (1.5kW)
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMCG)
SMCG20A-E3/57T FAQ
1.How can I place an order for SMCG20A-E3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCG20A-E3/57T on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for SMCG20A-E3/57T reliable?
The price and inventory of SMCG20A-E3/57T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCG20A-E3/57T is usually 5 days.
3.What payment methods are accepted for SMCG20A-E3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCG20A-E3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCG20A-E3/57T?
SMCG20A-E3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCG20A-E3/57T order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for SMCG20A-E3/57T?
For technical support, including SMCG20A-E3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCG20A-E3/57T requirements.
6.How does Aetrix verify that SMCG20A-E3/57T is sourced from the original manufacturer or authorized distributors?
All SMCG20A-E3/57T products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that SMCG20A-E3/57T meets industry standards.
7.What is the process for return or replacement of SMCG20A-E3/57T?
All SMCG20A-E3/57T units undergo pre-shipment inspection (PSI). If there is an issue with SMCG20A-E3/57T, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The SMCG20A-E3/57T part is unused and in its original packaging.
Return procedure for SMCG20A-E3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCG20A-E3/57T Tags
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